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  • Question

  • During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water.


  • Options
  • A. decreases
  • B. increases
  • C. remains unchanged
  • D. decreases linearly

  • Correct Answer
  • increases 

    • More questions

    • 1. With rise in pressure, the solubility of gases in solvent, at a fixed temperature

    • Options
    • A. increases
    • B. decreases
    • C. remains unchanged
    • D. decreases linearly
      • Discuss
    • 2. Presence of nickel in steel improves its

    • Options
    • A. corrosion resistance.
    • B. cutting ability.
    • C. wear resistance.
    • D. all (a), (b) and (c).
      • Discuss
    • 3. With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products

    • Options
    • A. decreases
    • B. increases
    • C. remains same
    • D. unpredictable from the data
      • Discuss
    • 4. If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is ?s is defined by

    • Options
    • A. ?s = 6 Vp/dp sp
    • B. ?s = Vp/dp sp
    • C. ?s = 6 dp Sp/Vp
    • D. ?s = dp Sp/Vp
      • Discuss
    • 5. Teflon is

    • Options
    • A. phenol formaldehyde
    • B. an inorganic polymer
    • C. polytetra florouethylene (PTFE)
    • D. a monomer
      • Discuss
    • 6. The unit of Cp in S.I. units is

    • Options
    • A. W/m2.°K
    • B. J/kg.°K
    • C. W/m.°K
    • D. J/m3. °K
      • Discuss
    • 7. Ferromagnetic ceramic material is not used in the

    • Options
    • A. thermal insulation
    • B. transformers
    • C. magnetic switches
    • D. television sets
      • Discuss
    • 8. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.

    • Options
    • A. zig-zag
    • B. chain
    • C. diamond
    • D. none of these
      • Discuss
    • 9. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

    • Options
    • A. Kelvin
    • B. Centigrade
    • C. Fahrenheit
    • D. Reaumer
      • Discuss
    • 10. Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

    • Options
    • A. rupture diaphragm
    • B. dikes
    • C. surge chamber
    • D. none of these
      • Discuss

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